Prompt Shield

Prompt-injection firewall for LLM applications with 33 input detectors and 9 output scanners, F1 96%.

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Prompt Shield is a prompt-injection firewall for LLM applications, combining 33 input detectors and 9 output scanners with a federated, signed threat-intel feed, measured at F1 96.0% with 0% false positives across 1040 tests. It's aimed at developers shipping LLM applications who need measurable, high-accuracy injection defense rather than a black-box filter.

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Behind the summary, Matchbox keeps a richer profile of Prompt Shield - the signals our matcher actually reads to decide when to surface it. It stays private; claim the listing to see and control it.

Problem & pain-point mapping
Who we surface it to (audience fit)
What it's a strong alternative to
Trust & credibility signals

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